linux-kernel - Re: [PATCH resend] vt: fix potential race in VT

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Message-Id: <1175470747.7772.14.camel@daplas>
Date:	Mon, 02 Apr 2007 07:39:07 +0800
From:	"Antonino A. Daplas" <adaplas@...il.com>
To:	spock@...too.org
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fbdev-devel@...ts.sourceforge.net
Subject: Re: [PATCH resend] vt: fix potential race in VT_WAITACTIVE handler

On Sun, 2007-04-01 at 14:43 +0200, Michal Januszewski wrote:
> From: Michal Januszewski <spock@...too.org>
> 
> On a multiprocessor machine the VT_WAITACTIVE ioctl call may return 0
> if fg_console has already been updated in redraw_screen() but the
> console switch itself hasn't been completed. Fix this by checking
> fg_console in vt_waitactive() with the console sem held.
> 
> Signed-off-by: Michal Januszewski <spock@...too.org>
Acked-by: Antonino Daplas <adaplas@....net>

Andrew,

Drop the old version I sent to you.

Tony


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